Water Fun Field Day Water Ninja Warrior Challenge, a sprinkler tug-of-war, water balloons and other family-friendly water games. Wear a swimsuit and shoes that can get wet. Age 10 and younger must be supervised by an adult. Sponsored by the Department of Parks and Recreation Office of Youth and Family Programs. 6-8 p.m. Drew Park, 3500 24th St. S., Arlington. 703-228-4773. parks.arlingtonva. Free.

Alexandria Archaeology Dig Days An introduction to the history and archaeology of Shuter’s Hill Site, a site tour, and the opportunity to sift through excavated soil and assist with artifact processing. 1:30-3 p.m. Shuter’s Hill Site at the Masonic Memorial, 101 Callahan Dr., Alexandria. 703-746-4399. apps.alexandriava.gov. $5 donation; registration required.

American Association for the Advancement of Science program For scientists, engineers and physicians, join K-12 STEM teachers in Arlington and Alexandria during the 2017-2018 school year. Orientation in September. For more information, call 571-551-2488 or email donaldrea@aol.com.

Hospital Elder Life Program seeks volunteers Volunteer Alexandria needs adult volunteers with excellent interpersonal communication skills to work with seniors and provide therapeutic activities, assist with patient mobilization, and assist patients with meals and feeding by providing encouragement. Visit the website for details and to sign up. 703-836-2176. handsonconnect.volunteeralexandria.org.

Social Justice Book Group A discussion of Gregory Boyle’s “Tattoos on the Heart: The Power of Boundless Compassion,” the story of one man’s ability to change lives in a gang-infested neighborhood in Los Angeles. 8 p.m. Clarendon United Methodist Church, 606 N. Irving, Arlington. jdixon580jd@gmail.com. Free.

NAMI/FOCUS support group For families and friends of those with bipolar disorder, schizophrenia or manic depression. Second Wednesday from 7:30-9:30 p.m. First Christian Church of Alexandria, 2723 King St., Alexandria. 571-451-0773. jgulka@verizon.net. Free.

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